Geforce 210 with Cycles?
Your card is no longer supported supported starting with blender 2.67.
Quote from the manual: 


  NVIDIA CUDA is supported for GPU rendering with NVIDIA graphics cards. We support graphics cards starting from GTX 4xx (computing capability 2.0).


And even if you made it work, (See this post) that card has only 16 cuda cores. Rendering on CPU is going much faster...